Which of the following do not have identical dimensions ?
(A) Momentum and impulse
(B) Torque and energy
(C) Torque and work
(D) Kinetic energy and potential energy
(D) Moment of a force and angular momentum
If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?
(A) P/2 cos 9/2
(B) IP sin 9/2
(C) 2P tan 9/2
(D) IP cos 9/2
(D) Psin 9/2
If a number of forces act simultaneously on a particle, it is possible_________________?
(A) not a replace them by a single force
(B) to replace them by a single force
(C) to replace them by a single force through C.G.
(D) to replace them by a couple
(D) to replace them by a couple and a force
A force acting on a body may_______________?
(A) introduce internal stresses
(B) balance the other forces acting on it
(C) retard its motion
(D) change its motion
(D) all of the above
Forces are called concurrent when their lines of action meet in_______________?
(A) one point
(B) two points
(C) plane
(D) perpendicular planes
(D) different planes
The unit of force in S.I. units is_________________?
(A) kilogram
(B) newton
(C) watt
(D) dyne
(D) joule
A force is completely defined when we specify________________?
(A) magnitude
(B) direction
(C) point of application
(D) all of the above
(D) none of the above
Effect of a force on a body depends upon________________?
(A) magnitude
(B) direction
(C) position or line of action
(D) all of the above
(D) none of the above
Forces are called coplanar when all of them acting on body lie in________________?
(A) one point
(B) one plane
(C) different planes
(D) perpendicular planes
(D) different points
The unit of power in S.I. units is______________?
(A) newton meter
(B) watt
(C) joule
(D) kilogram meter/sec
(D) pascal per sec